Old Harbour weather in March
In March, Old Harbour sees average daytime highs of 27°C and overnight lows near 22°C, with 31 mm of rain across 6.5 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 65% of the time in March, and the air most often feels muggy.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 06 min by month's end. Set against the rest of the year, March is Old Harbour's 3rd-clearest and 6th-windiest month. For the whole year in context, see Old Harbour's year-round climate.
- Daytime high
- 27°
- 9th warmest
- Overnight low
- 22°
- 3rd coldest
- Rainfall
- 31 mm
- 6.5 wet days
- Daylight
- 11 h 54 min
- 6:22 AM – 6:14 PM
- Cloud cover
- 36%
- 3rd clearest
- Wind
- 11 km/h
- 6th windiest
- Solar energy
- 5.99 kWh/m²
- Travel score
- 7.4
- out of 10
Old Harbour is city in Jamaica.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Day-to-day highs hold fairly steady near 27°C through the month.
A typical March day in Old Harbour reaches about 27°C in the afternoon and slips back to 22°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, March runs on par with February and on par with April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 22 |
| 2 | 27 | 22 |
| 3 | 27 | 22 |
| 4 | 27 | 22 |
| 5 | 27 | 22 |
| 6 | 27 | 22 |
| 7 | 27 | 22 |
| 8 | 27 | 22 |
| 9 | 27 | 22 |
| 10 | 27 | 22 |
| 11 | 27 | 22 |
| 12 | 27 | 22 |
| 13 | 27 | 22 |
| 14 | 27 | 22 |
| 15 | 27 | 22 |
| 16 | 27 | 22 |
| 17 | 27 | 22 |
| 18 | 27 | 22 |
| 19 | 27 | 22 |
| 20 | 27 | 22 |
| 21 | 27 | 22 |
| 22 | 27 | 22 |
| 23 | 27 | 22 |
| 24 | 27 | 22 |
| 25 | 28 | 22 |
| 26 | 28 | 22 |
| 27 | 28 | 22 |
| 28 | 28 | 22 |
| 29 | 28 | 22 |
| 30 | 28 | 22 |
| 31 | 28 | 22 |
How March really feels in Old Harbour
Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Old Harbour weather by month
How March compares with the rest of the year at a glance. March is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 22° | 17 | 4.4 | 11 | 7.8 |
| Feb | 27° / 22° | 17 | 4.6 | 11.4 | 7.7 |
| Mar | 27° / 22° | 31 | 6.5 | 11.9 | 7.4 |
| Apr | 28° / 23° | 48 | 9.4 | 12.4 | 6.6 |
| May | 28° / 23° | 119 | 15.4 | 12.8 | 5.2 |
| Jun | 29° / 24° | 68 | 11 | 13.1 | 5.2 |
| Jul | 30° / 25° | 52 | 9.4 | 13 | 5.2 |
| Aug | 30° / 25° | 86 | 14.6 | 12.6 | 4.5 |
| Sep | 29° / 24° | 139 | 18.9 | 12.1 | 4.2 |
| Oct | 28° / 24° | 140 | 21.4 | 11.6 | 4.3 |
| Nov | 28° / 23° | 67 | 11.7 | 11.2 | 6.1 |
| Dec | 27° / 22° | 30 | 6.2 | 10.9 | 7.4 |
Cloud cover in March
The sky is clear or mostly clear about 65% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 24% of March, with mostly cloudy or overcast conditions the remaining 12%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 90 | 90 | 89 | 89 | 89 | 89 | 88 | 88 | 88 | 87 | 87 | 87 | 87 | 87 | 87 | 87 | 88 | 88 | 88 | 89 | 89 | 89 | 89 | 89 | 90 | 90 | 89 | 89 | 88 | 88 | 88 |
| Cloudier (%) | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 11 | 11 | 12 | 12 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 90 | 10 |
| 2 | 90 | 10 |
| 3 | 89 | 11 |
| 4 | 89 | 11 |
| 5 | 89 | 11 |
| 6 | 89 | 11 |
| 7 | 88 | 12 |
| 8 | 88 | 12 |
| 9 | 88 | 12 |
| 10 | 87 | 13 |
| 11 | 87 | 13 |
| 12 | 87 | 13 |
| 13 | 87 | 13 |
| 14 | 87 | 13 |
| 15 | 87 | 13 |
| 16 | 87 | 13 |
| 17 | 88 | 12 |
| 18 | 88 | 12 |
| 19 | 88 | 12 |
| 20 | 89 | 11 |
| 21 | 89 | 11 |
| 22 | 89 | 11 |
| 23 | 89 | 11 |
| 24 | 89 | 11 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 89 | 11 |
| 28 | 89 | 11 |
| 29 | 88 | 12 |
| 30 | 88 | 12 |
| 31 | 88 | 12 |
Chance of precipitation in March
Old Harbour gets around 31 mm of rain over 6.5 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% and peaks near 24% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 19 | 19 | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Rain chance (%) | |
|---|---|
| 1 | 16 |
| 2 | 16 |
| 3 | 16 |
| 4 | 16 |
| 5 | 16 |
| 6 | 17 |
| 7 | 17 |
| 8 | 18 |
| 9 | 19 |
| 10 | 19 |
| 11 | 20 |
| 12 | 21 |
| 13 | 21 |
| 14 | 22 |
| 15 | 22 |
| 16 | 22 |
| 17 | 23 |
| 18 | 23 |
| 19 | 23 |
| 20 | 23 |
| 21 | 24 |
| 22 | 24 |
| 23 | 24 |
| 24 | 24 |
| 25 | 24 |
| 26 | 24 |
| 27 | 24 |
| 28 | 24 |
| 29 | 24 |
| 30 | 24 |
| 31 | 24 |
Humidity in March
Most of March feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the muggy band about 79% of days. Sticky, muggy-or-worse air turns up on roughly 90% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Muggy (%) | 84 | 83 | 83 | 82 | 81 | 80 | 80 | 80 | 80 | 79 | 80 | 80 | 79 | 79 | 79 | 79 | 79 | 78 | 79 | 78 | 79 | 78 | 79 | 78 | 77 | 77 | 76 | 75 | 74 | 72 | 71 |
| Oppressive (%) | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 20 | 22 | 23 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 1 | 10 | 84 | 5 |
| 2 | 1 | 11 | 83 | 5 |
| 3 | 1 | 11 | 83 | 5 |
| 4 | 1 | 11 | 82 | 6 |
| 5 | 1 | 12 | 81 | 6 |
| 6 | 2 | 12 | 80 | 6 |
| 7 | 2 | 12 | 80 | 6 |
| 8 | 2 | 11 | 80 | 7 |
| 9 | 2 | 11 | 80 | 7 |
| 10 | 2 | 11 | 79 | 8 |
| 11 | 2 | 10 | 80 | 8 |
| 12 | 1 | 10 | 80 | 9 |
| 13 | 1 | 10 | 79 | 10 |
| 14 | 1 | 9 | 79 | 11 |
| 15 | 1 | 9 | 79 | 11 |
| 16 | 1 | 8 | 79 | 12 |
| 17 | 1 | 8 | 79 | 12 |
| 18 | 1 | 8 | 78 | 13 |
| 19 | 1 | 7 | 79 | 13 |
| 20 | 1 | 7 | 78 | 14 |
| 21 | 0 | 7 | 79 | 14 |
| 22 | 0 | 7 | 78 | 15 |
| 23 | 0 | 6 | 79 | 15 |
| 24 | 0 | 6 | 78 | 16 |
| 25 | 0 | 6 | 77 | 17 |
| 26 | 0 | 6 | 77 | 17 |
| 27 | 0 | 6 | 76 | 18 |
| 28 | 0 | 6 | 75 | 19 |
| 29 | 0 | 6 | 74 | 20 |
| 30 | 0 | 6 | 72 | 22 |
| 31 | 0 | 6 | 71 | 23 |
Wind in March
Winds average 11 km/h in March.
Across March, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over March. Sunrise moves from 6:33 AM to 6:09 AM, and sunset from 6:10 PM to 6:17 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:33 | 6:32 | 6:32 | 6:31 | 6:30 | 6:30 | 6:29 | 6:28 | 6:27 | 6:27 | 6:26 | 6:25 | 6:24 | 6:23 | 6:23 | 6:22 | 6:21 | 6:20 | 6:19 | 6:19 | 6:18 | 6:17 | 6:16 | 6:15 | 6:14 | 6:14 | 6:13 | 6:12 | 6:11 | 6:10 | 6:09 |
| Sunset (PM) | 6:10 | 6:11 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:16 | 6:16 | 6:17 | 6:17 | 6:17 | 6:17 | 6:17 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:33 | 6:10 |
| 2 | 11.6 | 6:32 | 6:11 |
| 3 | 11.7 | 6:32 | 6:11 |
| 4 | 11.7 | 6:31 | 6:11 |
| 5 | 11.7 | 6:30 | 6:11 |
| 6 | 11.7 | 6:30 | 6:12 |
| 7 | 11.7 | 6:29 | 6:12 |
| 8 | 11.7 | 6:28 | 6:12 |
| 9 | 11.8 | 6:27 | 6:13 |
| 10 | 11.8 | 6:27 | 6:13 |
| 11 | 11.8 | 6:26 | 6:13 |
| 12 | 11.8 | 6:25 | 6:13 |
| 13 | 11.8 | 6:24 | 6:14 |
| 14 | 11.8 | 6:23 | 6:14 |
| 15 | 11.9 | 6:23 | 6:14 |
| 16 | 11.9 | 6:22 | 6:14 |
| 17 | 11.9 | 6:21 | 6:15 |
| 18 | 11.9 | 6:20 | 6:15 |
| 19 | 11.9 | 6:19 | 6:15 |
| 20 | 11.9 | 6:19 | 6:15 |
| 21 | 12.0 | 6:18 | 6:15 |
| 22 | 12.0 | 6:17 | 6:16 |
| 23 | 12.0 | 6:16 | 6:16 |
| 24 | 12.0 | 6:15 | 6:16 |
| 25 | 12.0 | 6:14 | 6:16 |
| 26 | 12.0 | 6:14 | 6:16 |
| 27 | 12.1 | 6:13 | 6:17 |
| 28 | 12.1 | 6:12 | 6:17 |
| 29 | 12.1 | 6:11 | 6:17 |
| 30 | 12.1 | 6:10 | 6:17 |
| 31 | 12.1 | 6:09 | 6:17 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 5.99 kWh/m².
For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 6.68 kWh/m² in July across the year — March's 5.99 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.6 | Bright |
| 2 | 5.7 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.7 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.9 | Bright |
| 12 | 5.9 | Bright |
| 13 | 5.9 | Bright |
| 14 | 5.9 | Bright |
| 15 | 5.9 | Bright |
| 16 | 6.0 | Bright |
| 17 | 6.0 | Bright |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Intense |
| 20 | 6.1 | Intense |
| 21 | 6.1 | Intense |
| 22 | 6.1 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.3 | Intense |
| 30 | 6.3 | Intense |
| 31 | 6.3 | Intense |
Hazard calendar for Old Harbour
None of Old Harbour's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Old Harbour sits in the Atlantic hurricane belt; the season peaks August–October.
Old Harbour's rainy season runs August–November, when most of the year's rain falls.
Is March a good time to visit Old Harbour?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit Old Harbour for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Old Harbour in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Old Harbour sees daytime highs around 27°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.
Sea temperature near Old Harbour in March
The nearest coast averages about 27°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 29°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Warm |
| May | 28 | Tropical |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Old Harbour in March
Clear-sky midday UV in March peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Old Harbour peaks around April 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 11 | 12 | 13 | 12 | 12 | 11 | 12 | 12 | 11 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Air quality in Old Harbour in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Old Harbour is worst in June — around 35 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (January, 17 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 17 | 18 | 18 | 24 | 35 | 34 | 29 | 23 | 24 | 20 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 17 | Moderate |
| Mar | 18 | Moderate |
| Apr | 18 | Moderate |
| May | 24 | Moderate |
| Jun | 35 | Poor |
| Jul | 34 | Moderate |
| Aug | 29 | Moderate |
| Sep | 23 | Moderate |
| Oct | 24 | Moderate |
| Nov | 20 | Moderate |
| Dec | 17 | Moderate |
Where is Old Harbour?
Old Harbour sits at 17.9°N, 77.1°W, 30 m above sea level, in Jamaica. The nearest listed city is May Pen, 15 km away.
Topography around Old Harbour
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Old Harbour.
Within 3 km, the terrain around Old Harbour has only modest variations in elevation — a maximum elevation change of 211 m around an average of 38 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 738 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,229 m.
The land around Old Harbour is covered by trees (46%), grassland (28%) and artificial surfaces (22%) within 3 km, trees (59%) within 16 km, and water (51%) and trees (40%) within 80 km.
Jamaica travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 110 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $8,003
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Homicide rate
- 49.4
- per 100k, 2023
- Road deaths
- 15.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Old Harbour (17.9414°, -77.109°, elevation 30 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).